- Which is a unit of electric power ?
- watt
- volt
- kilowatt-hour
- ampere

- How much electrical energy is used when a 120 V appliance operates at 2.0 A for 1.0 s ?
- 240 J
- 30,000 J
- 60. J
- 480 J

- An electric motor lifts a 10. kg mass 100. m in 10. s. The power developed by the motor is
- 980 W
- 9800 W
- 9.8 W
- 98 W

- If energy is used at a rate of 20. J/s in an electric circuit, the power developed is
- 100 W
- 5.0 W
- 25 W
- 20. W

- Energy is being consumed at the greatest rate in an appliance drawing
- 5.0 A at 110 V
- 10. A at 220 V
- 10. A at 110 V
- 5.0 A at 220 V

- Assuming total conversion of electrical energy to heat energy, how much heat is produced by a 20. W heater in 5.0 s ?
- 25 J
- 100 J
- 24 J
- 4.0 J

- A 60 W light bulb draws 2.0 A of current. The resistance of the bulb is
- 1.5 ohms
- 15 ohms
- 30 ohms
- 120 ohms

- A circuit is supplied with a constant voltage. As the resistance of the circuit decreases, the power dissipated by the circuit
- remains the same
- decreases
- increases
- increases when St. Mary's Soccer scores 2 goals

- The current in a resistor is 3.0 A, and its resistance is 10 ohms. What is the power developed in the resistor ?
- 30. W
- 3.3 W
- 90. W
- 60. W

- The electrical energy consumed by a 20 ohm resistor carrying a current of 2.0 A for 1.0 sec is
- 80. J
- 5.0 W
- 40. W
- 40. J